{"cve":"CVE-2026-64546","nvd":{"published":"2026-07-27T21:17:07.270","modified":"2026-10-19T21:17:44.577","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/edid: fix OOB read in drm_parse_tiled_block()\n\ndrm_parse_tiled_block() casts the DisplayID block to a\nstruct displayid_tiled_block and reads the full fixed layout up to\ntile->topology_id[7] without checking block->num_bytes. The DisplayID\niterator only validates the declared payload length, so a crafted EDID\ncan advertise a tiled-display block (tag DATA_BLOCK_TILED_DISPLAY, or\nDATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY for v2.0) with a small num_bytes at\nthe end of a DisplayID extension. The read then runs past the end of the\nexact-sized kmemdup()'d EDID allocation, a heap out-of-bounds read.\n\nReject blocks shorter than the spec's 22-byte tiled payload before\nreading the fixed struct, as drm_parse_vesa_mso_data() already does.\n\n  BUG: KASAN: slab-out-of-bounds in drm_edid_connector_update\n  Read of size 2 at addr ffff888010077700 by task exploit/147\n   dump_stack_lvl (lib/dump_stack.c:94 ...)\n   print_report (mm/kasan/report.c:378 ...)\n   kasan_report (mm/kasan/report.c:595)\n   drm_edid_connector_update (drivers/gpu/drm/drm_edid.c:7581)\n   bochs_connector_helper_get_modes (drivers/gpu/drm/tiny/bochs.c:574)\n   drm_helper_probe_single_connector_modes (drivers/gpu/drm/drm_probe_helper.c:426)\n   status_store (drivers/gpu/drm/drm_sysfs.c:219)\n   ...\n   vfs_write (fs/read_write.c:595 fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1},"cwes":["CWE-125"],"references":["https://git.kernel.org/stable/c/157727131ce8a52d8d9bc676c372ef82db6436c4","https://git.kernel.org/stable/c/4137e1ecec9c8cb6c4fcee28ffabbbc7409eb7fb","https://git.kernel.org/stable/c/4f5484d25f85ad6c989bad5f6a43450cecfcfd28","https://git.kernel.org/stable/c/9acd5c1ddc17ca4c5ffa0c373e3fdf480506e061","https://git.kernel.org/stable/c/9cc0f8e63e8c34cf43def35cbd305ba711181a1f"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:56:58.798400159+00:00"},"epss":{"cve":"CVE-2026-64546","score":0.0013,"percentile":0.02637,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}